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8.8 High Exploited

CVE-2023-42917 Apple Multiple Products WebKit Memory Corruption Vulnerability

Active exploitation observed

· CISA KEV catalogue
Required action Apply remediations or mitigations per vendor instructions or discontinue use of the product if remediation or mitigations are unavailable.
Ransomware campaigns Not observed so far
Weakness CWE-787

Description

A memory corruption vulnerability was addressed with improved locking. This issue is fixed in iOS 17.1.2 and iPadOS 17.1.2, macOS Sonoma 14.1.2, Safari 17.1.2. Processing web content may lead to arbitrary code execution. Apple is aware of a report that this issue may have been exploited against versions of iOS before iOS 16.7.1.

Affected products and versions

Product Affected versions Fixed in
Safari 17.1 earliest → < 17.1 17.1
macOS 14.1 earliest → < 14.1 14.1
iOS and iPadOS 17.1 earliest → < 17.1 17.1

References

Timeline

  1. Published
  2. Added to the KEV catalogue
  3. Last modified

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CVE-2026-113904 A use-after-free issue was addressed with improved memory management 4.3 Medium CVE-2026-113949 A type confusion issue was addressed with improved state management 8.8 High CVE-2026-112621 An out-of-bounds write issue was addressed with improved bounds checking 7.5 High CVE-2026-112699 An out-of-bounds read was addressed with improved bounds checking 6.5 Medium
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